What does this research mean for the field?

Mechanical treatment of zinc metallurgical waste induces structural and morphological changes that significantly improve the extraction efficiency of Zn, Cu, and Fe during sulfuric acid leaching. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine the structural changes, metal extraction efficiencies, and apparent zinc dissolution kinetics during sulfuric acid leaching of mechanically treated zinc metallurgical waste.

September 8, 2026MineralsOpen Access

Sulfuric Acid Leaching of Zn, Cu, and Fe from Mechanically Treated Zinc Metallurgical Waste: Apparent Kinetics of Zn Dissolution

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Authors

ADAkmaral DuisenAl-Farabi Kazakh National University GKGalymzhan KaramyrzayevAl-Farabi Kazakh National University TOTimur OsserovIonosphere Institute

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Implication

Experimental study demonstrates enhanced zinc and copper extraction from mechanically treated slag, indicating mechanical pretreatment improves hydrometallurgical recovery.

Key Points

To determine the structural changes, metal extraction efficiencies, and apparent zinc dissolution kinetics during sulfuric acid leaching of mechanically treated zinc metallurgical waste.
Characterized initial and mechanically treated metallurgical waste using X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy.
Performed batch leaching experiments varying sulfuric acid concentration (up to 1.0 M), reaction time, and temperature (75 °C).
Modeled zinc dissolution kinetics using Shrinking Core Model surface-reaction and product-layer-diffusion equations to calculate apparent activation energies.
In 1.0 M H2SO4, leaching of mechanically treated waste yielded extraction rates of 70.55 ± 0.88% for Zn, 90.50 ± 0.47% for Cu, and 42.37 ± 0.47% for Fe.
At 1.0 M H2SO4 and 75 °C, Zn extraction reached 78.06 ± 0.92% at 120 min, whereas Cu extraction peaked at 90.78 ± 0.55% at 60 min.
Apparent activation energies for Zn dissolution were 8.16 kJ mol−1 untreated versus 10.17 kJ mol−1 treated for chemical reaction control, and 14.37 kJ mol−1 untreated versus 17.81 kJ mol−1 treated for diffusion control.

Cite This Study

Duisen et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd7d558e84d0ff5b46d80 https://doi.org/10.3390/min16090921

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Implication

Experimental study demonstrates enhanced zinc and copper extraction from mechanically treated slag, indicating mechanical pretreatment improves hydrometallurgical recovery.

Sulfuric Acid Leaching of Zn, Cu, and Fe from Mechanically Treated Zinc Metallurgical Waste: Apparent Kinetics of Zn Dissolution

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Key Points

Cite This Study

Sulfuric Acid Leaching of Zn, Cu, and Fe from Mechanically Treated Zinc Metallurgical Waste: Apparent Kinetics of Zn Dissolution

Discussion

Member takes

Implication

Key Points

Cite This Study

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